420129798 has 32 divisors (see below), whose sum is σ = 930337920. Its totient is φ = 125410560.

The previous prime is 420129797. The next prime is 420129803. The reversal of 420129798 is 897921024.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420129797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43083 + ... + 51926.

It is an arithmetic number, because the mean of its divisors is an integer number (29073060).

Almost surely, 2^420129798 is an apocalyptic number.

420129798 is an abundant number, since it is smaller than the sum of its proper divisors (510208122).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

420129798 is a wasteful number, since it uses less digits than its factorization.

420129798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95092.

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 420129798 is about 20497.0680342336. The cubic root of 420129798 is about 748.9643768600.

The spelling of 420129798 in words is "four hundred twenty million, one hundred twenty-nine thousand, seven hundred ninety-eight".